From: "mame (Yusuke Endoh) via ruby-core" <ruby-core@...>
Date: 2026-06-25T06:56:01+00:00
Subject: [ruby-core:125835] [Ruby Bug#22129] error_highlight raises NotImplementedError for ArgumentErrors that get wrapped

Issue #22129 has been updated by mame (Yusuke Endoh).

Status changed from Assigned to Closed

Merged, thank you!

----------------------------------------
Bug #22129: error_highlight raises NotImplementedError for ArgumentErrors that get wrapped
https://bugs.ruby-lang.org/issues/22129#change-117756

* Author: rwstauner (Randy Stauner)
* Status: Closed
* Assignee: mame (Yusuke Endoh)
* Backport: 3.3: DONTNEED, 3.4: DONTNEED, 4.0: REQUIRED
----------------------------------------
With code like

```ruby
def x(y:) = y

begin
  x
rescue => e
  p e.exception("wat").detailed_message
end
```

a NotImplementedError is raised on ruby 4.0+

```
/Users/rwstauner/.rubies/4.0.2/lib/ruby/4.0.0/error_highlight/base.rb:297:in 'ErrorHighlight::Spotter#spot': NotImplementedError (NotImplementedError)
        from /Users/rwstauner/.rubies/4.0.2/lib/ruby/4.0.0/error_highlight/base.rb:68:in 'ErrorHighlight.spot'
        from /Users/rwstauner/.rubies/4.0.2/lib/ruby/4.0.0/error_highlight/core_ext.rb:34:in 'ErrorHighlight::CoreExt#generate_snippet'
        from /Users/rwstauner/.rubies/4.0.2/lib/ruby/4.0.0/error_highlight/core_ext.rb:43:in 'ErrorHighlight::CoreExt#detailed_message'
        from tiny.rb:6:in 'Exception#full_message'
        from tiny.rb:6:in '<main>'
tiny.rb:1:in 'Object#x': missing keyword: :y (ArgumentError)

    caller: tiny.rb:4
    |   x
        ^
    callee: tiny.rb:1
    | def x(y:) = y
          ^
        from tiny.rb:4:in '<main>'
```

on ruby 3.4 it did not raise:

```
tiny.rb:1:in 'x': wat (ArgumentError)
        from tiny.rb:4:in '<main>'
```

seems related to https://bugs.ruby-lang.org/issues/21543

I have a PR up at https://github.com/ruby/error_highlight/pull/78



-- 
https://bugs.ruby-lang.org/
______________________________________________
 ruby-core mailing list -- ruby-core@ml.ruby-lang.org
 To unsubscribe send an email to ruby-core-leave@ml.ruby-lang.org
 ruby-core info -- https://ml.ruby-lang.org/mailman3/lists/ruby-core.ml.ruby-lang.org/